2022 Fiscal Year Final Research Report
Radio Sensing Techniques with Artificial Intelligence for Diagnosing Insulation Deterioration of Ground Coils of Superconducting Maglev Systems
| Project/Area Number |
20K04418
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 21010:Power engineering-related
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| Research Institution | The University of Tokushima |
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Principal Investigator |
KAWADA Masatake 徳島大学, 大学院社会産業理工学研究部(理工学域), 教授 (00303686)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 超電導磁気浮上式鉄道 / 地上コイル / 推進コイル / 浮上・案内コイル / 絶縁劣化診断 / 部分放電 / 電磁波センシングシステム / 知能型 |
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| Outline of Final Research Achievements |
Condition monitoring systems for a large number of ground coils: propulsion coils and levitation-guidance coils are required to operate the superconducting magnetic levitation (SC Maglev) systems safely. We have been developing a radio sensing system with artificial intelligence for detecting a partial discharge (PD) which is a symptom of insulation degradation of propulsion coils from SC Maglev trains. It was found that the relationship between the received power of the UHF electromagnetic (EM) waves and the received power of the UHF PD current is logarithmically linear; the relationship between the received power of the UHF EM waves and the received power of HF and lower band PD current is also logarithmically linear; however, the variance of the plots in the HF and lower band PD current is larger than that of the plots in the UHF PD current. The apparent charge of PDs cannot be directly estimated from the received power of the UHF EM waves due to the variance.
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| Free Research Field |
電気電子工学
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| Academic Significance and Societal Importance of the Research Achievements |
超電導磁気浮上式鉄道の地上コイルは，車両の推進，浮上，案内を実現するための設備であり，実運用では膨大な数の地上コイルが使用される。地上コイルには長期間の機械的，電気的，環境的負荷が複合的に加わることから，地上コイルの絶縁破壊事故を未然に防ぐために，絶縁劣化予兆現象（部分放電）の早期発見が必要となる。
本研究では超電導磁気浮上式鉄道の走行車両から地上コイル（推進コイル）の絶縁劣化の予兆現象である部分放電を検出し，部分放電電流を推定するための知能型電波センシングシステムの開発を進めた。UHF帯電磁波の受信電力からUHF帯およびHF帯の部分放電電流の受信電力を推定できることを示した。
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